六月十二课下作业

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
 
public class Test{
    public static void main(String[] args) {
        Map<String,String> map=new HashMap();
        map.put("亚亚","Q妹");
        map.put("菲菲","Q妹");
        map.put("欧欧","Q仔");
        map.put("美美","Q妹");
        Set<String> keyset = map.keySet();
        Iterator<String> iter = keyset.iterator();
        while (iter.hasNext()){
            String key = iter.next();
            String value = map.get(key);
            System.out.println(key+"\t"+value);
        }
 
 
    }
 
 
}

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
 
public class Test{
    public static void main(String[] args) {
        Map<String,String> map=new HashMap();
        map.put("亚亚","Q妹");
        map.put("菲菲","Q妹");
        map.put("欧欧","Q仔");
        map.put("美美","Q妹");
        Set<String> keyset = map.keySet();
        Iterator<String> iter = keyset.iterator();
        while (iter.hasNext()){
            String key = iter.next();
            String value = map.get(key);
            System.out.println(key+"\t"+value);
        }
 
        System.out.println("使用foreach遍历");
        for (String key : keyset) {
            String value = map.get(key);
            System.out.println(key+"\t"+value);
        }
    }
 
 
}